Nissan Sentra. Manual — part 866
TM-100
< SYSTEM DESCRIPTION >
[CVT: RE0F11A]
SYSTEM
For engine brake control on a downhill, the control can be stopped with CONSULT.
Control In Acceleration
From change of the vehicle speed or accelerator pedal position, the acceleration request level of the driver or
driving scene is evaluated. In start or acceleration during driving, the gear shift characteristics with linearity of
revolution increase and vehicle speed increase are gained to improve the acceleration feel.
SELECT CONTROL
SELECT CONTROL : System Description
INFOID:0000000009759351
SYSTEM DIAGRAM
DESCRIPTION
Based on accelerator pedal angle, engine speed, primary pulley speed, and the secondary pulley speed, the
optimum operating pressure is set to reduce impact of a selector lever operation while shifting from “N” (“P”) to
“D” (“R”) position.
LOCK-UP CONTROL
JSDIA2060GB
JSDIA1862GB
SYSTEM
TM-101
< SYSTEM DESCRIPTION >
[CVT: RE0F11A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
LOCK-UP CONTROL : System Description
INFOID:0000000009759352
SYSTEM DIAGRAM
DESCRIPTION
• Controls for improvement of the transmission efficiency by engaging the torque converter clutch in the
torque converter and eliminating slip of the converter. Achieves comfortable driving with slip control of the
torque converter clutch.
• The oil pressure feed circuit for the torque converter clutch piston chamber is connected to the torque con-
verter clutch control valve. The torque converter clutch control valve is switched by the torque converter
clutch solenoid valve with the signal from TCM. This controls the oil pressure circuit, which is supplied to the
torque converter clutch piston chamber, to the release side or engagement side.
• If the CVT fluid temperature is low or the vehicle is in fail-safe mode due to malfunction, lock-up control is
prohibited.
Lock-up engagement
In lock-up engagement, the torque converter clutch solenoid valve makes the torque converter clutch control
valve locked up to generate the lock-up apply pressure. This pushes the torque converter clutch piston for
engagement.
Lock-up release condition
In lock-up release, the torque converter clutch solenoid valve makes the torque converter clutch control valve
non-locked up to drain the lock-up apply pressure. This does not engage the torque converter clutch piston.
IDLE NEUTRAL CONTROL
JSDIA1865GB
TM-102
< SYSTEM DESCRIPTION >
[CVT: RE0F11A]
SYSTEM
IDLE NEUTRAL CONTROL : System Description
INFOID:0000000009759353
SYSTEM DIAGRAM
DESCRIPTION
If a driver has no intention of starting the vehicle in D position, TCM operates the low brake solenoid valve and
controls the oil pressure of the low brake to be low pressure. Therefore, the low brake is in the release (slip)
JSDIA2535GB
SYSTEM
TM-103
< SYSTEM DESCRIPTION >
[CVT: RE0F11A]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
status and the power transmission route of transaxle is the same status as the N position. In this way, the tran-
saxle is in idling status and load to the engine can be reduced to improve fuel economy.
Idle Neutral Control Start Condition
Idle neutral control is started when all of the following conditions are fulfilled. However, during idle neutral con-
trol, idle neutral control is stopped when any of the following conditions is not met.
NOTE:
Stops or prohibits the idle neutral control when the TCM and ECM detect that the vehicle is in one of the fol-
lowing conditions.
• Engine coolant temperature and CVT fluid temperature are the specified temperature or more, or the speci-
fied temperature or less.
• When a transaxle malfunction occurs.
• When the vehicle detects DTC and is in the fail-safe mode.
• When idle speed increases due to heavy electric load*.
*: When any one of rear window defogger switch, A/C switch, headlamp, fog lamp is turned ON. In addition,
when the steering wheel is operated.
JSDIA2536GB
Driving environment
: Flat road or road with mild gradient
Selector lever position
: “D” position
Vehicle speed
: 0 km/h (0 MPH)
Accelerator pedal position
: 0.0/8
Brake pedal
: Depressed
Engine speed
: Idle speed
Turn signal lamp/hazard signal lamp
: Not activated
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